Kory Draughn

Software Developer

iRODS Consortium

June 8-11, 2021

iRODS User Group Meeting 2021

Virtual Event

NFSRODS 2.0

NFSRODS 2.0

Overview

• Brief description of NFSRODS
• What's changed since the last release
• The list operation (i.e. /bin/ls)
• Future Work

What is NFSRODS?

A standalone NFSv4.1 server that enables presenting iRODS as a mountable filesystem.

• Configurable
• Users do not have to learn iCommands
• Users do not have to install any additional packages
• Supports many common *nix commands and software

What's changed since 1.0.0?

13 issues have been resolved.

• NFSRODS now uses Jargon Connection Caching
• The mtime rule engine plugin requirement has been relaxed
• The rename operation (i.e. mv) now supports overwriting data objects
• The portmap service message warning has been resolved

All resolved issues can be found at the following URL:

• https://github.com/irods/irods_client_nfsrods/releases/tag/2.0.0

The list operation

Prior implementations had issues.

• Didn't handle large collections
  • Results were truncated
  • The implementation was incorrect
• Poor performance against Oracle databases
• Slow
  • Extra work
  • No caching

The list operation (cont.)

These issues have been resolved.

• NFSRODS now caches many, if not all, results obtained through Jargon
• Added options to Jargon that enable support of Oracle. See the troubleshooting section of the NFSRODS README for details
• We learned that using a log level that results in a lot of messages degrades performance
• We learned that applying color to the output triggers more stat operations (which means more network traffic)

The list operation (cont.)

Performance comparison between 1.0.0 and 2.0.0.

Test setup:

• iRODS provider (backed by Postgres) running on Ubuntu 16.04 (32 cores)
• NFSRODS container running on the same machine hosting the provider
• Set NFSRODS log level to INFO
• Mount command: sudo mount -o port=2050 localhost:/ /mnt/nfsrods
• Timing command: time /bin/ls <collection> | wc -l

Future Work

• Add parallel I/O support for large file transfers
• Investigate support of metadata via extended file attributes
• Improve test coverage
• Return better error messages
• SMBRODS

Thank you!

Questions?